Preheat the oven to 400°F (200°C).
Prepare the sweet potatoes by peeling and cubing them into uniform pieces.
In a large bowl, combine the miso paste, olive oil, maple syrup, and garlic powder until smooth.
Add the sweet potato cubes to the bowl and toss to coat all pieces evenly.
Spread the coated sweet potatoes onto a lined baking sheet in a single layer.
Roast in the preheated oven for 25-30 minutes, tossing halfway through.
Once golden and fork-tender, remove from the oven and season with salt and pepper to taste.
Serve warm as a side dish or incorporate into salads for a nutritious boost.
